Using of an analog LM35 temp sensor
Dependencies: mbed
Fork of
LM35_Temp_Sensor
by 
Joël Imbaud
Main.cpp@0:9a81759ea4c0, 2019-01-08 (annotated)
- Committer:
- jimbaud
- Date:
- Tue Jan 08 10:38:28 2019 +0000
- Revision:
- 0:9a81759ea4c0
Using of an analog LM35 temp sensor
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| jimbaud | 0:9a81759ea4c0 | 1 | // http://www.ti.com/lit/ds/symlink/lm35.pdf |
| jimbaud | 0:9a81759ea4c0 | 2 | |
| jimbaud | 0:9a81759ea4c0 | 3 | #include "mbed.h" |
| jimbaud | 0:9a81759ea4c0 | 4 | |
| jimbaud | 0:9a81759ea4c0 | 5 | AnalogIn analog_value(A0); |
| jimbaud | 0:9a81759ea4c0 | 6 | DigitalOut led(LED1); |
| jimbaud | 0:9a81759ea4c0 | 7 | |
| jimbaud | 0:9a81759ea4c0 | 8 | |
| jimbaud | 0:9a81759ea4c0 | 9 | int main() { |
| jimbaud | 0:9a81759ea4c0 | 10 | float meas; |
| jimbaud | 0:9a81759ea4c0 | 11 | printf("\nAnalogIn example\n"); |
| jimbaud | 0:9a81759ea4c0 | 12 | |
| jimbaud | 0:9a81759ea4c0 | 13 | while(1) { |
| jimbaud | 0:9a81759ea4c0 | 14 | meas = analog_value.read(); // Converts and read the analog input value (value from 0.0 to 1.0) |
| jimbaud | 0:9a81759ea4c0 | 15 | meas = meas * 3300; // Change the value to be in the 0 to 3300 range |
| jimbaud | 0:9a81759ea4c0 | 16 | printf("measure = %.0f mV\n", meas); |
| jimbaud | 0:9a81759ea4c0 | 17 | |
| jimbaud | 0:9a81759ea4c0 | 18 | if (meas > 2000) |
| jimbaud | 0:9a81759ea4c0 | 19 | { // If the value is greater than 2V then switch the LED on |
| jimbaud | 0:9a81759ea4c0 | 20 | led = 1; |
| jimbaud | 0:9a81759ea4c0 | 21 | } |
| jimbaud | 0:9a81759ea4c0 | 22 | else |
| jimbaud | 0:9a81759ea4c0 | 23 | { |
| jimbaud | 0:9a81759ea4c0 | 24 | led = 0; |
| jimbaud | 0:9a81759ea4c0 | 25 | } |
| jimbaud | 0:9a81759ea4c0 | 26 | |
| jimbaud | 0:9a81759ea4c0 | 27 | wait(2); // 200 ms |
| jimbaud | 0:9a81759ea4c0 | 28 | } |
| jimbaud | 0:9a81759ea4c0 | 29 | } |